Nice show.

Regarding YJ's apology, I really would have liked some clarification on two points:
1. Did she come clean about her more than year long deception to HS before running off with YH (who anyway knew about it while it was going on)? Did she apologize for that part at the time (i.e. not as part of the half uttered apology she said to him when he took her back? Because that's definitely a part that pertains to lack of honesty and respect and that she should have felt sorry and apologized for irrespective of whether she wanted to continue staying with HS. It's something the he absolutely should have been made aware of prior to any conversation about taking her back, in order to make an informed decision. I am not sure whether she knew he knew (hopefully if she didn't she told him at some point prior to the moment where she asked him to take her back). Again, this is something she should have apologized for two years ago, independently of whether she wanted to be with him or not. Not saying that she didn't, not saying that she did, but this would have been the best scenario in that situation given that it would have come at a non suspicious timing and would seem more genuine and less self serving.
2. Was the apology after he took her back including the bit about the more than year long deception, or was it about running off with her lover and not saying a word to HS for two years? In any case, I must say that the fact it arrives now, after two years of complete silence where she apparently didn't feel any need to do this, when she broke up with DK and wants HS to take her back, does make it feel less genuine than if it came at a less convenient (for her) timing and with no strings attached (i.e. while she was trying to convince him to take her back.

All in all, I do perceive in her a rather self serving streak that makes me wonder if the second one would have come at all had things gone differently with DK, as for the first one, I don't even know if it was made or if she came clean about the deception that HS already knew about (not asserting that it wasn't and she didn't), and if it did whether it happened at the time or now that she wants him back... we don't know anything, so it's hard to judge exactly what I am seeing. But I do get the suspicious that HS would have never heard from her again, like he didn't in the past two years, if things had gone differently with DK (but we don't know). But maybe things went differently with DK exactly because she decided she was in love with HS and not DK (HS's cousin seemed to imply that she left DK for him, and she seemed to be in love with HS and not DK, but as to what prompted this change of heart, we are left in the dark... she mentions a model, but it's unclear if it's DK's rebound... again, we know nothing). The thing is, her apology shouldn't really depend on whether she wants to be with HS or not. I think that it's reasonable to separate the pieces, and maybe when she loved DK and not HS and left with the former she didn't regret it, but she does not because she is no longer in love with DK but with HS instead... it would have been an interesting question to ask, because she still refers to it as "love" and says she "followed her heart" when she dumped HS for DK (and indeed if she fell out of love with HS and in love with DK there is nothing wrong with telling HS that and breaking up, what's wrong is the more than year long deception that is an entirely separate matter, and that she should feel sorry and apologize for irrespective of how things ended up with DK and HS, and as discussed above hopefully do so years ago, not now that she wants HS back.

The whole point being, I guess, that we don't have the information to get a clean picture, these are just some random thoughts on the matter and how I would feel about various scenarios and how self serving some scenarios could be compared to others.